centos 6 yum install desktop

yum -y groupinstall "Desktop" "Desktop Platform" "X Window System" "Fonts"

yum -y groupinstall "Graphical Administration Tools"

yum -y groupinstall "Internet Browser"

yum -y groupinstall "General Purpose Desktop"

yum -y groupinstall "Office Suite and Productivity"

yum -y groupinstall "Graphics Creation Tools"

GUI to CLI: Ctrl + Alt + F6

CLI to GUI: Ctrl + Alt + F1